Hollow Rotatory Actuator
DETAILS:
Sango Hollow Rotatory Actuators combine an oversized center through-hole with ultra-rigid cross-roller bearings and planetary gear reduction mechanisms.
Designed for automated index tables, optical positioning platforms, and robotic wrist axes, these actuators allow electrical cables, air hoses, and optical fibers to pass directly through the rotatory center.
Sango Automation Limited is a premier manufacturer of hollow rotatory actuators and precision hollow rotary indexing tables in China. Built for high-density electronic assembly, semiconductor inspection, and laser indexing, our hollow rotary actuators deliver high payload capacity and zero-backlash motion.
Product Overview
A hollow rotatory actuator integrates a large center through-hole with precision gear reduction and high-rigidity cross-roller bearings directly on the output rotating table.
By passing wiring harnesses, pneumatic tubing, and laser optics through the central aperture, engineers eliminate complex cable chains and slip rings, drastically reducing maintenance downtime and machine footprint.
Whether you need a compact Ø28mm aperture table for camera inspection or a heavy-duty Ø100mm aperture rotary stage supporting 5,000 N axial loads, Sango offers full customization and motor adapter flexibility.
How It Works
Large Center Through-Hole
Large central aperture enables clean, internal routing of electrical cables, optical lines, and air hoses without external tangling.
Integrated Cross-Roller Bearing
High-rigidity cross-roller bearing supports massive axial loads, radial cantilever forces, and high tilting moments directly on the rotating table.
Precision Planetary Gear Train
Internal planetary reduction gears deliver smooth speed reduction ratios from 5:1 to 105:1 with lost motion under 1 arcminute.
Universal Servo & Stepper Adapter
Custom CNC motor mounting plates interface directly with any servo or stepper motor brand without requiring shaft couplings.
Technical Parameters
| Parameter | Value / Range | Note |
|---|---|---|
| Through-hole aperture diameter | Ø28 mm to Ø100 mm | Center pass-through for wiring & air lines |
| Permissible axial load | 500 N to 5,000 N | Supported by cross-roller bearing |
| Permissible tilting moment | 15 N·m to 120 N·m | High moment rigidity |
| Positioning accuracy | ≤ 1 arcmin (Arcseconds precision) | Laser interferometry tested |
| Repetitive positioning accuracy | ±15 arcsec (±0.004°) | Zero lost motion indexing |
| Reduction ratio options | 5:1, 10:1, 18:1, 30:1, 50:1, 105:1 | Single & multi-stage planetary setup |
| Rotating table outer diameter | Ø60 mm to Ø280 mm | Precision ground steel table top |
All specifications apply to standard catalog models and OEM custom aperture requests.
Manufacturing Capabilities
Sango operates ultra-precision CNC internal/external cylindrical grinding machines and raceway grinders dedicated to hollow rotary actuator production. Raceways for our integrated cross-roller bearings are ground to sub-micron tolerances for smooth, vibration-free rotation under heavy tilting moment loads.
Every hollow rotary actuator undergoes 100% CMM optical alignment checks and laser interferometry verification to ensure strict compliance with positioning specs.
Bearing Raceway Grinding
Actuator Assembly Line
Laser Interferometry Lab
Popular Hollow Actuator Models
Best-selling hollow rotary tables for automation indexing.
HRT-080 Hollow Rotary Table
Compact Ø28mm through-hole hollow actuator for NEMA 23 stepper and 200W servo motors.
HRT-130 High-Torque Hollow Actuator
Oversized Ø50mm center aperture with cross-roller bearing supporting up to 3,000 N axial loads.
HRT-200 Heavy-Payload Rotary Stage
Large Ø100mm center through-hole for passing laser optics and pneumatic manifolds in optical indexing.
